Dark green dragons, once they mature, appear to become an entirely different species. However, this isn’t true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Sean is a survivor, having escaped "certain" death multiple times. He has been stabbed, shot with arrows, crushed by a rockslide after falling into a crater, and nearly decapitated. If it wasn't for the skills of the White dragons, and his own ability to make decoy heads from his vines, Sean would have died of his injuries a long time ago.

Because of all these experiences, he is very good at pretending to be dead. As a result he keeps being cast in the flock's plays as a character scripted to die. This has earned him the nickname "The Walking Spoiler", and it surprises everyone when he finishes a play without an elaborate death scene.